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Depletion of Gadolinium burnable poison in a PWR assembly with high burnup fuel

机译:消耗高燃耗燃料的压水堆组件中ple可燃毒物的消耗

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摘要

A tendency to increase the discharge burnup of nuclear fuel for Advanced Pressurized Water Reactors (PWR) has been a characteristic of its operation for many years. It will be able to burn at very high burnup of about 70 GWd/t with UO2 fuels. The U-235 enrichment must be higher than 5 %, which leads to the necessity of using an extremely efficient burnable poison like Gadolinium oxide. Using gadolinium isotope is significant due to its particular depletion behavior ("Onion-Skin" effect). In this paper, the MCNPX2.7 code is used to calculate the important neutronic parameters of the next generation fuels of PWR. K-infinity, local peaking factor and fission rate distributions are calculated for a PWR assembly which burn at very high burnup reaching 70 GWd/t. The calculations are performed using the recently released evaluated Gadolinium cross section data. The results obtained are close to those of a LWR next generation fuel benchmark problem. This demonstrates that the calculation scheme used is able to accurately model a PWR assembly that operates at high burnup values.
机译:多年来,一直有增加高级压水堆(PWR)的核燃料排放燃尽的趋势。用UO2燃料将能够以约70 GWd / t的极高燃耗燃烧。 U-235的浓缩度必须高于5%,这导致必须使用极高效的可燃毒物,例如氧化d。由于its的特殊耗尽行为(“洋葱皮”效应),使用同位素非常重要。在本文中,MCNPX2.7代码用于计算下一代压水堆燃料的重要中子参数。计算了压水堆组件的K-无穷大,局部峰值因子和裂变速率分布,该组件以非常高的燃耗达到70 GWd / t燃烧。使用最近发布的评估evaluated横截面数据进行计算。获得的结果接近于轻水堆下一代燃料基准测试问题。这表明所使用的计算方案能够准确地模拟以高燃耗值运行的PWR组件。

著录项

  • 来源
    《Kerntechnik》 |2015年第6期|563-568|共6页
  • 作者

    Refeat R. M.;

  • 作者单位

    NRRA, Safety Engn Dept, Nasr City POB 11762,3 Ahmed Alzomer St, Cairo, Egypt;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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